I have a server running an older application that only supports MySQL 3.23
(it may run fine under MySQL 4 or 5, but I haven't had the time yet to
test it). Currently this server is running MySQL 3.23.49 and I'd like to
upgrade it to the last 3.23 release of 3.23.58. Can I just copy the data
files from .49 to .58? This installation is using only MyISAM tables.

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